Question # 1

Which pair gives same dehydrohalogenation product

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I-Chlorobutane, 2-Chlorobutane

I-Chloropropane, 2-Chloropropane

I-Bromopentane. 3-Bromopentane

iso-butvl chloride. 2°- butyl chloride

Variable Oxidation state of is related to transition elements

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empty d-subshells

Completely filled

Partially filled d-subshell

d-d transition

lonic bond is produced after complete transfer of

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nucleus

neutrons

electrons

protons

The state of matter which exist only within a relatively narrow range of temperature and pressure

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Solid

Gas

Liquid

Plasma

Which one of the following reaction of carboxylic acid is reversible?

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Esterification

Salt formation

Reaction with PCI5

Reaction with SOCI2

The word paper is derived from the name of which reedy plant

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rose

sun flower

papyrus

water hyacinth

The hydrocarbon with maximum B.P is

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CH4

C6H14

C4H10

C2H6

In which system hydrogen bonding is not present

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solution of ethanol in water

linking of helix in protein molecule

structure of ice

solution of NaCl in benzene

Cement is mixture of so many compounds roasted in rotary kiln.Which substance has greater percentage:

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Lime

Alumina

Silica

Magnesia

Liquids have definite volume due to

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Negligible spaces

Intermolecular force

Motion

Both a and b

Which of the following best describes the shape and polarity of the carbon disulphide molecule?

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Bent and polar

Linear and non-polar

Pyramidal and polar

Bent and non-polar

Aqueous solution of glucose C₆H₁₂O₆, boils at 100.052°C. The solution contains

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180 grams glucose in 1 kg water

18 grams glucose in 1 kg water

1.8 grams glucose in 1 kg water

3.6 grams glucose in 1 kg

Which of the following groups will increase the acidity of phenol?

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-NO₂

-CN

-X (halogens)

All

According to Mendeleev, the properties of the elements are periodic function of their

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Atomic number

Atomic volumes

Atomic masses

Atomic densities

In OF₂, number of bond pairs and Ione paris of electrons are respectively

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2,6

2,8

2,10

2,9

A white precipitate ofsilver chlorideimmediately formed on additionof :

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Silver nitrate solution to sodium chloride solution.

Silver chloride solution to sodium nitrate solution.

Silver nitrate solution to potassium chloride solution

Silver nitrate solution to hydrogen chloride solution.

Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

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Fullerences

Freons

Polyhalogens

Ferrocene

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

Which of the following represents elements in order of increasing atomic size?

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I, Br, Cl

Na, Mg, C

C, N, O

Li, Na, K

The spectrum of helium is expected to be similar to that of

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H

Li⁺

Na

He⁺

The charge of an electron is determined by

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J.J. Thomson

Crooks

Perrin

R.A.Millikan

According to VSEPR theory, the shape of the water molecule is

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Octahedral

Distorted tetrahedral

Planar triangle

Linear

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